Thats about what my stock 1.6td motors do with the blowoff valve, with t3 and k24 turbos as far as peak, which I think is by design.
I do most of my driving on the freeway.
Steady I don't get 10 unless I'm cruising with hills and/or wind, and it can easily max out.
If I travel on flat land and just chill out going about 74mph, close to 3000 rpms I will get less than 10, maybe closer to 5.